@inproceedings{sun-etal-2023-characters,
    title = "From Characters to Words: Hierarchical Pre-trained Language Model for Open-vocabulary Language Understanding",
    author = "Sun, Li  and
      Luisier, Florian  and
      Batmanghelich, Kayhan  and
      Florencio, Dinei  and
      Zhang, Cha",
    editor = "Rogers, Anna  and
      Boyd-Graber, Jordan  and
      Okazaki, Naoaki",
    booktitle = "Proceedings of the 61st Annual Meeting of the Association for Computational Linguistics (Volume 1: Long Papers)",
    month = jul,
    year = "2023",
    address = "Toronto, Canada",
    publisher = "Association for Computational Linguistics",
    url = "https://aclanthology.org/2023.acl-long.200/",
    doi = "10.18653/v1/2023.acl-long.200",
    pages = "3605--3620"
}